diff --git a/runtime/syntax/rrst.vim b/runtime/syntax/rrst.vim
index 24d3844..b643af3 100644
--- a/runtime/syntax/rrst.vim
+++ b/runtime/syntax/rrst.vim
@@ -2,7 +2,7 @@
 " Language: reST with R code chunks
 " Maintainer: Alex Zvoleff, azvoleff@mail.sdsu.edu
 " Homepage: https://github.com/jalvesaq/R-Vim-runtime
-" Last Change: Sat Feb 06, 2016  06:45AM
+" Last Change: Tue Jun 28, 2016  08:53AM
 "
 " CONFIGURATION:
 "   To highlight chunk headers as R code, put in your vimrc:
@@ -19,8 +19,6 @@
 " load all of the r syntax highlighting rules into @R
 syntax include @R syntax/r.vim
 
-setlocal iskeyword=@,48-57,_,.
-
 " highlight R chunks
 if exists("g:rrst_syn_hl_chunk")
   " highlight R code inside chunk header